The 10 most harmful books

Human Events asked some esteemed conservatives for the 10 most harmful books of the 19th and 20th Century, I checked out the list. I was a bit sad, I only have 4 of the top ten books and 3 books receiving honorable mention on my bookshelves. I don't think there could be a liberal list because all knowledge is a good thing to have, even if you don't agree with it; it is always wise to know what and how those you don't agree with are thinking.